"Chasing Ice" is a documentary about shrinking glaciers. The film follows National Geographic photographer James Balog through Iceland, Greenland, and Alaska as he captures irrefutable evidence of the world's changing landscape on time-lapse cameras.

The film's message about the devastating effects of climate change is so convincing that it even turned a die-hard climate-denier — and admitted fan of political pundit Bill O'Reilly— into a true believer.

"[Chasing Ice] hasn't just changed be about global warming, it has changed me as a person," the woman says in a poignant video clip that was posted on YouTube.